TC74VHC245FTELM

Overview

The TC74VHC245FTELM is an octal bus transceiver from the VHC logic series, manufactured by Toshiba Semiconductor and Storage. It utilizes silicon gate C2MOS technology to provide high-speed operation comparable to Bipolar Schottky TTL while maintaining low power dissipation. The device supports a wide operating voltage range of 2.0 V to 5.5 V and features balanced propagation delays with a typical value of 4.0 ns at 5 V supply. It includes static discharge protection on all inputs and offers three-state outputs for effective bus isolation when disabled.

Feature Summary

• High-speed data transmission capability similar to equivalent Bipolar Schottky TTL
• Low power dissipation with minimal quiescent current consumption
• Wide operating voltage range supporting various system levels
• Balanced propagation delays between low-to-high and high-to-low transitions

Applications

• Two-way asynchronous communication between data busses
• Level shifting in mixed-voltage systems
• Bus-oriented memory and signal driving applications

Procurement Notes

Verify the specific package suffix 'ELM' against official Toshiba documentation, as standard datasheets list F (SOP), FT (TSSOP), and FK (VSSOP). Confirm RoHS compliance status directly with the manufacturer or authorized distributors. Ensure design reviews cover parasitic diode limitations regarding direct 5 V to 3 V interfacing without additional circuitry.

Selection Notes

Select this component for designs requiring bidirectional data transfer with high noise immunity and low power consumption. The VHC series provides performance advantages over older HC/HCT families. Consider the specific package availability for the ELM suffix and ensure unused inputs are tied to VCC or GND to prevent floating states.

Part Context

This part belongs to the TC74VHC245 family of octal bus transceivers. It is functionally compatible with the 74ALS245 standard. The device is designed for general-purpose digital logic applications where bidirectional data flow control is necessary via DIR and G inputs.

Replacement Considerations

Direct pin-compatible replacements include other manufacturers' 74VHC245 variants. Verify electrical characteristics such as propagation delay and output drive current match the original requirements before substitution.